NJU6080 CONSTANT CURRENT LED DRIVER with PWM CONTROL ■ GENERAL DESCRIPTION The NJU6080 is a constant current LED driver with PWM control. NJU6080 can reduce board density compared with the case composed discrete because the constant current value can be set with one resistance. It can contribute to the reliability improvement of the system because it has an over current protection circuit and thermal shutdown circuit. The NJU6080 is suited for a LCD back light and toys, etc. ■ PACKAGE OUTLINE NJU6080F1 ■ FEATURES ● Supply Voltage Range : 2.5V ~ 5.5V ● LED Output Current : 100mA ( max. ) ● Output Current Accuracy : ± 1.8% ● Operating Current : 150µA ( typ. ) ● One white LED can be lit. ● External Parts : Current limitation resistance ● Internal Thermal Overload Protection ● Internal Over Current Protection ● CMOS Technology ● Package Outline : SOT-23-6 ■ BLOCK DIAGRAM VDD NJU6080 LED VREF ( 0.2V ) RS Current Limit / Thermal Shut Down GND Control Logic EN PWM ■ PIN CONFIGRATION 6 5 4 NJU6080 1 Ver.2010-06-25 2 3 1. PWM 2. GND 3. RS 4. LED 5. EN 6. VDD -1- NJU6080 ■ ABSOLUTE MAXIMUM RATINGS ( Ta = 25°C ) PARAMETER SYMBOL RATINGS UNIT Supply Voltage VDD - 0.3 ~ + 7.0 V Output Voltage VLED - 0.3 ~ + 7.0 V Output Current ILED 200 mA EN Pin Voltage VEN + 7.0 ( *1 ) V PWM Pin Voltage VPWM + 7.0 ( *1 ) V Power Dissipation PD 400 ( *2 ) MW Operating Temperature Topr - 40 ~ + 85 °C Storage Temperature Tstg - 40 ~ + 125 °C (*1) : When input voltage is less than +7V, the absolute maximum control voltage is equal to the input voltage. (*2) : Mounted on glass epoxy board ( 76.2 × 114.3 × 1.6mm: 2Layers FR-4 ) ■ RECOMMENDED OPERATING CONDITION PARAMETER Supply Voltage Output Voltage SYMBOL VDD VLED CONDITIONS MIN. 2.5 - TYP. - ( Ta = 25°C ) MAX. UNIT 5.5 V 5.5 V ■ ELECTRICAL CHARACTERISTICS PARAMETER Quiescent Current Quiescent Current at OFF Output Current Accuracy Output Pin Voltage 1 Output Pin Voltage 2 Output Pin Leak Current 1 Output Pin Leak Current 2 EN Pin ON Voltage EN Pin OFF Voltage PWM Pin ON Voltage PWM Pin OFF Voltage EN Pin Input Current PWM Pin Input Current RS Pin Leak Current PWM Pin ON Delay Time PWM Pin OFF Delay Time Maximum Output Current -2- ( VDD = 3.0V, VLED = 0.5V, RS = 10Ω, VEN = VPWM = VDD, Ta = 25°C ) SYMBOL CONDITIONS MIN. TYP. MAX. UNIT IDD 150 260 µA IDD_OFF VEN = GND 0.1 µA ∆ILED - 1.8 + 1.8 % VLED1 ILED = 20mA 0.3 0.4 V VLED2 ILED = 100mA 0.4 0.5 V ILEAK1 VEN = GND, VDD = VLED = 5.5V 0.1 µA ILEAK2 VPWM = GND, VDD = VLED = 5.5V 0.1 µA VEN_ON ILED = OFF → ON 1.6 VDD V VEN_OFF ILED = ON → OFF 0 0.3 V VPWM_ON ILED = OFF → ON 0.7VDD VDD V VPWM_OFF ILED = ON → OFF 0 0.3VDD V IEN 0.1 µA IPWM 0.1 µA ILEAK_RS VEN = GND, VRS = VLED = 3V 0.1 µA tPWM_ON VPWM = L → H 2.5 µs tPWM_OFF VPWM = H → L 0.1 µs ILED_MAX RS = 0 Ω 100 200 mA Ver.2010-06-25 NJU6080 ■ APPLYCATION CIRCUIT Output Current Wave at PWM Dimming VLED ILED 0 VDD VDD LED NJU6080 ILED = 0.2 / RS ILED VREF ( 0.2V ) RS Current Limit / Thermal Shut Down GND Control Logic EN Current Sence Resistor PWM Control signal at PWM Dimming H : Active L : Standby Ver.2010-06-25 H : LED ON L : LED OFF -3- NJU6080 ■ TYPICAL CHARACTERISTICS Supply Voltage vs. Quiescent Current Supply Voltage vs. Quiescent Current at OFF 0.1 300 Quiescent Current : IDD ( µA ) Quiescent Current at OFF : IDD_OFF ( nA ) VLED = 0.5V RS = 10Ω EN = PWM = VDD Ta = 25ºC 250 200 150 100 50 VLED = 0.5V RS = 10Ω EN = GND PWM = VDD Ta = 25ºC 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 0 0 1 2 3 4 5 6 0 7 1 2 Supply Voltage : VDD ( V ) Output Voltage vs. Output Pin Leak Current1 VDD = 5.5V RS = 10Ω EN = GND PWM = VDD 0.25 Output PinLeak Current2 : ILEAK2 ( nA ) Output Pin Leak Current1 : ILEAK( nA ) 5 6 7 Output Voltage vs. Output Pin Leak Current2 0.2 0.15 0.1 0.05 0 VDD = 5.5V RS = 10Ω EN = VDD PWM = GND 0.25 0.2 0.15 0.1 0.05 0 0 1 2 3 4 5 6 7 0 1 Output Voltage : VLED ( V ) 2 3 4 5 6 7 Output Voltage : VLED ( V ) RS Pin Voltage vs. RS Pin Leak Current Output Voltage vs. Muximum Output Current 0.5 350 0.4 Muximum Output Current : ILED_MAX (mA VLED = 3.0V RS = OPEN PWM = EN = VDD = 3.0V Ta = 25ºC 0.45 RS Pin Leak Current : ILEAK_RS ( nA ) 4 0.3 0.3 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 RS=0Ω EN=PWM=VDD VLED： 4w ire Ta = 25ºC 300 250 200 150 100 VDD=2.5V 50 VDD=3V VDD=5.5V 0 0 1 2 3 4 5 RS Pin Voltage : VRS ( V ) -4- 3 Supply Voltage : VDD ( V ) 6 7 0 1 2 3 4 5 6 7 Output Voltage : VLED ( V ) Ver.2010-06-25 NJU6080 ■ TYPICAL CHARACTERISTICS Quiescient Current vs. Temperature Quiescient Current at OFF vs. Temperature 300 Quiescient Current : IDD ( µA ) 250 200 150 100 50 VDD=2.5V VDD=3V Quiescient Current at OFF : IDD_OFF ( µA ) 1 0.1 0.01 0.001 0.0001 VDD=2.5V 0.00001 VDD=3.0V VDD=7.0V VDD=7V 0 -50 0 50 100 0.000001 -50 150 0 Temperature : Ta ( ºC ) Output Leak Current 1 vs. Temperature 100 Output Leak Current 2 : ILEAK 2 ( nA ) 1000 100 10 1 VLED=0.5V 0.1 VLED=1V 100 10 1 VLED=0.5V 0.1 VLED=1V VLED=3V VLED=3V VLED=7V VLED=7V 0.01 -50 0 50 100 0.01 -50 150 0 Temperature : Ta ( ºC ) 50 100 EN Pin ON Voltage vs. Temperature EN Pin OFF Voltage vs. Temperature 1.05 VDD=2.5V VDD=2.5V 1 VDD=3V VDD=7V 0.95 EN Pin OFF Voltage : VEN_OFF ( V ) EN Pin ON Voltage : VEN_ON ( V ) 1 0.9 0.85 0.8 0.75 0.7 0.65 VDD=3V VDD=7V 0.95 0.9 0.85 0.8 0.75 0.7 0.65 0 50 Temperature : Ta ( ºC ) Ver.2010-06-25 150 Temperature : Ta ( ºC ) 1.05 0.6 -50 150 Output Leak Current 2 vs. Temperature 1000 Output Leak Current 1 : ILEAK ( nA ) 50 Temperature : Ta ( ºC ) 100 150 0.6 -50 0 50 100 150 Temperature : Ta ( ºC ) -5- NJU6080 ■ TYPICAL CHARACTERISTICS PWM OFF Voltage vs. Temperature 4 3.5 3.5 PWM OFF Voltage : V PWM_OFF ( V ) PWM ON Voltage : VPWM_ON ( V ) PWM ON Voltage vs. Temperature 4 3 2.5 2 1.5 1 VDD=2.5V VDD=3V 0.5 3 2.5 2 1.5 1 VDD=2.5V VDD=3V 0.5 VDD=7V 0 -50 0 50 100 VDD=7V 0 -50 150 0 50 Temperature : Ta ( ºC ) Muximum Output Current vs. Temperature Muximum Output Current : ILED_MAX ( mA ) 300 250 250 200 200 150 150 100 100 VDD=2.5V VDD=3V 50 VDD=5.5V VDD=2.5V VDD=3V 50 VDD=5.5V VDD=7V 0 -50 0 50 100 VDD=7V 0 -50 150 0 50 Temperature : Ta ( ºC ) 100 Supply Voltage vs. Output Current vs. Temperature 20.5 Output Current vs. Temperature VDD=2.5V Ta=-50℃ 20.4 20.4 VDD=3V Ta=25℃ VDD=7V 20.3 Ta=125℃ Output Current : ILED ( mA ) Output Current : ILED ( mA ) 20.3 20.2 20.1 20 19.9 19.8 20.2 20.1 20 19.9 19.8 19.7 19.7 19.6 19.6 19.5 0 1 2 3 4 150 Temperature : Ta ( ºC ) 20.5 5 Supply Voltage : VDD ( V ) -6- 150 Muximum Output Current vs. Temperature 300 Muximum Output Current : ILED_MAX ( mA ) 100 Temperature : Ta ( ºC ) 6 7 19.5 -50 0 50 100 150 Temperature : Ta ( ºC ) Ver.2010-06-25 NJU6080 ■ TYPICAL CHARACTERISTICS Output Voltage vs. Output Current vs. Temperature Output Current vs. Temperature 20.5 22 20.4 21.5 VLED=0.3V 21 Output Current : ILED ( mA ) Output Current : ILED ( mA ) 20.3 20.5 20 19.5 Ta=-50℃ 19 Ta=25℃ VLED=0.4V VLED=0.5V 20.2 20.1 20 19.9 19.8 19.7 Ta=125℃ 18.5 19.6 18 0.0 1.0 2.0 3.0 4.0 5.0 6.0 19.5 -50 7.0 0 Output Voltage : VLED ( V ) PWM_ON Delay Time vs. Temperature 7 0.09 VDD=3V PWM_OFF Delay Time : TPWM_OFF ( µs ) PWM_ON Delay Time : TPWM_ON ( µs ) 150 PWM_OFF Delay Time vs. Temperature VDD=2.5V VDD=5.5V VDD=7V 6 5 4 3 2 1 VDD=2.5V 0.08 VDD=3V VDD=5.5V 0.07 VDD=7V 0.06 0.05 0.04 0.03 0.02 0.01 0 50 Temperature : Ta ( ºC ) Ver.2010-06-25 100 0.1 8 0 -50 50 Temperature : Ta ( ºC ) 100 150 0 -50 0 50 100 150 Temperature : Ta ( ºC ) -7- NJU6080 [CAUTION] The specifications on this databook are only given for information , without any guarantee as regards either mistakes or omissions. The application circuits in this databook are described only to show representative usages of the product and not intended for the guarantee or permission of any right including the industrial rights. -8- Ver.2010-06-25